Question

the wavelength associated with a ball of 200g and movibg with a speed of 5m/hour is of the order of​

Answer 1

According to de Broglie's equation

λ=

mv

h

where, λ= de-Broglie wavelength

$$h=6.626 \times 10^{−34}Js$$=Planck's constant

m=mass of object=200 g= 0.2 kg and v= velocity=5m/h=5/3600 m/s

upon substitution we get:

$$\lambda =\frac{6.626 \times 10^{−34}\times 3600}{0.2 \times 5}$$

$$\lambda=2.385 \times 10^{−30}$$m